<template>
  <div>
    <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 提示区域 -->
        <el-alert title="添加商品信息" type="info" show-icon center :closable="false">
        </el-alert>
        <!-- 进度条 -->
        <!-- activeInex-0 将字符串变成数字类型 -->
        <el-steps :space="200" :active="activeInex-0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top" label-width="100px">
            <el-tabs tab-position="left" v-model="activeInex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类">
                        <el-cascader
                            v-model="addForm.goods_cat"
                            :options="cateList"
                            :props="{ expandTrigger: 'hover',...cascaderProps }"
                            @change="handleChange"
                            ></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <!-- 渲染表单的Item -->
                    <el-form-item v-for="item in manyParamsList" :key="item.attr_id" :label="item.attr_name">
                        <!-- 复选框组 -->
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyParamsList" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <!-- action表示图片要上传的后台地址 -->
                    <el-upload
                        action="http://127.0.0.1:8888/api/private/v1/upload"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture"
                        :headers="headerObj"
                        :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!-- 添加商品按钮 -->
                    <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="30%"
  >
  <img :src="previewPath" alt="" class="previewImg">
  
</el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
name:'Add',
data() {
    return {
        activeInex:'0',
        // 添加商品的表单
        addForm:{
            goods_name:'',
            goods_price:0,
            goods_weight:0,
            goods_number:0,
        // 级联选择框选中的数组
            goods_cat:[],
            // 图片的数组
            pics:[],
            // 商品详情描述
            goods_introduce:'',
            attrs:[]
        },
        addFormRules:{
            goods_name:[
                { required: true, message: '请输入商品名称', trigger: 'blur' },

            ],
            goods_price:[
                { required: true, message: '请输入商品价格', trigger: 'blur' },

            ],
            goods_weight:[
                { required: true, message: '请输入商品重量', trigger: 'blur' },

            ],
            goods_number:[
                { required: true, message: '请输入商品数量', trigger: 'blur' },

            ],
        },
        // 商品分类列表
        cateList:[],
        cascaderProps:{
            value:'cat_id',
            label:'cat_name',
            children:'children',
            
        },
        // 动态参数列表
        manyParamsList:[],
        // 静态属性列表
        onlyParamsList:[],
        // 预览图片的地址
        previewPath:'',
        previewVisible:false
        
    }
},
created() {
    this.getCateList()
},
methods: {
    async getCateList() {
        const {data:res}=await this.$http.get('categories')
        if(res.meta.status!==200) return this.$message.error('获取商品分类数据失败')
        this.cateList=res.data
        
        // console.log(this.cateList);
    },
    handleChange() {
        if(this.addForm.goods_cat.length!==3) {
            this.addForm.goods_cat=[]
        }
    },
    beforeTabLeave(activeName,oldactiveName) {
        // console.log('old',oldactiveName);
        // console.log('new',activeName);
        if(oldactiveName==='0'&&this.addForm.goods_cat.length!==3) {
            this.$message.error('请先选择商品分类')
            return false
        }
    },
    async tabClicked() {
        if(this.activeInex==='1') {
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'many'}
            })
            if(res.meta.status!==200) return this.$message.error('获取动态参数失败')
            res.data.forEach(item => {
                item.attr_vals=item.attr_vals?item.attr_vals.split(' '):[]
            });
            this.manyParamsList=res.data
            console.log(this.manyParamsList);
        } else if(this.activeInex==='2') {
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'only'}
            })
            if(res.meta.status!==200) return this.$message.error('获取静态属性失败')
            
            this.onlyParamsList=res.data
            // console.log(this.onlyParamsList);
        }
    },
    // 图片预览
    handlePreview(file) {
        this.previewPath=file.response.data.url
        this.previewVisible=true
    },
    // 图片删除
    handleRemove(file) {
        // 先获取删除图片的path
        const filePath=file.response.data.tmp_path
        // 通过path找到索引值
        const i= this.addForm.pics.findIndex((item)=>{
            item.pic===filePath
        })
        // 通过数组的splice删除
        this.addForm.pics.splice(i,1)
    },
    // 上传图片成功
    handleSuccess(reponse) {
        // console.log(reponse);
        const picInfo={
            pic:reponse.data.tmp_path
        }
        this.addForm.pics.push(picInfo)
        console.log(this.addForm);
    },
    // 添加商品按钮
    add() {
        this.$refs.addFormRef.validate(async val=>{
            if(!val) {
                return this.$message.error('请填写必要的表单项')
            }
            // 执行添加
            // 深拷贝
            const form=_.cloneDeep(this.addForm)
            form.goods_cat=form.goods_cat.join(',')
            
            // 处理动态参数
            this.manyParamsList.forEach(item=>{
                const newInfo={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)

            })
            // 处理静态属性
            this.onlyParamsList.forEach(item=>{
                const newInfo={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals
                }
                this.addForm.attrs.push(newInfo)
            })
            form.attrs=this.addForm.attrs
            console.log(form);
            // 发起请求添加商品
            const {data:res}=await this.$http.post('goods',form)
            console.log(res);
            if(res.meta.status!==201) return this.$message.error('添加商品失败')
            this.$message.success('添加商品成功')
            this.$router.push('/goods')
        })
        // console.log(this.addForm);
        
    }
},
computed:{
    cateId() {
        if(this.addForm.goods_cat.length===3) {
            return this.addForm.goods_cat[2]
        }
    },
    // 图片上传的请求头对象
        headerObj(){
            return {Authorization:window.sessionStorage.getItem('token')}
        }
}
}
</script>

<style scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}
.previewImg {
    width: 100%;
}
.btnadd {
    margin-top: 15px;
}
</style>